Posts Currently viewing the category: "Leak Testing Principles"

Sniffing Location Testing


Sniffing Location Testing is the manual version of the Inside-Out test. The part to be tested is pressurized with trace gas but is then ‘sniffed’ using a sniffer wand on a leak detector rather than being placed within a vacuum chamber for a total go-no-go ‘sniff’ test. As the probe passes a…(Read More)

The component to be tested is connected to a vacuum pump and Leak Detector and evacuated. The part is held in a chamber or hood which is filled with a known Tracer Gas – typically Helium. The system (Leak Detector) then monitors for the ingress, hence the term Outside-In, of Tracer Gas to the part…(Read More)

The component to be tested is pressurized with test trace gas, typically Helium, either pre-charged and inserted in a vacuum chamber or charged during evacuation. Any leak in the system will allow the trace gas to leak into the vacuum chamber where it will be detected by the leak detector. This is the preferred…(Read More)

Pressure testing can be used to detect larger leaks requiring correction prior to the component undergoing a more sensitive, Mass Spectrometer/Leak Detector test. Unless there is significant time available, Pressure Decay is the least sensitive of all the techniques discussed here but does have a very valuable role to play in the production scenario…(Read More)